EP 0097131 A1 19831228 - Method of preparing low-density ethylene copolymers.
Title (en)
Method of preparing low-density ethylene copolymers.
Title (de)
Verfahren zur Herstellung von Äthylen-Mischpolymerisaten mit niedriger Dichte.
Title (fr)
Procédé de préparation de copolymères d'éthylène à basse densité.
Publication
Application
Priority
IT 2180582 A 19820610
Abstract (en)
Method for the copolymerization of ethylene with C<sub>4</sub>-C<sub>B</sub> alpha-olefins by means of a suspension method in an organic liquid, at a temperature of from 50° C to 70° C, at a pressure of less than about 10 bar, on a Ziegler catalyst constituted by: a) an alkylaluminium or alkylaluminium halide; b) the product of the reaction of a halogenated derivative oftitanium with a support material; the support material being the solid, spheroidal product of the spray drying of a solution of magnesium chloride in ethanol containing at least one additional compound chosen from the following classes:- aliphatic, cycloaliphatic or aromatic liquid hydrocarbons with a boiling point higher than that of ethanol at atmospheric pressure;- polar, organic hydroxy or ester compounds which are solid or liquid with a boiling point higher than that of ethanol at atmospheric pressure;the solid, spheroidal, spray-dried product also having the following characteristics:- particle form: spherical with a size of from 1 to 100 microns.- Apparent density of the particles: from 0.1 to 1 g/ml;- alcoholic hydroxyl group content: from 1.5 to 20% by weight;- surface area: from 10 to 100 m<sup>2</sup>/g;- porosity from 1.2 to 3.5 ml/g;- pore radius: from 1,000 to 65,000 Angstroms.
IPC 1-7
IPC 8 full level
C08F 2/14 (2006.01); C08F 2/18 (2006.01); C08F 4/00 (2006.01); C08F 4/60 (2006.01); C08F 4/64 (2006.01); C08F 4/654 (2006.01); C08F 210/00 (2006.01); C08F 210/16 (2006.01)
CPC (source: EP US)
C08F 210/16 (2013.01 - EP US)
C-Set (source: EP US)
Citation (search report)
- [Y] FR 2198784 A1 19740405 - MONTEDISON SPA [IT]
- [Y] FR 2434180 A1 19800321 - MONTEDISON SPA [IT]
- [Y] FR 2342995 A1 19770930 - MITSUI PETROCHEMICAL IND [JP]
- [A] FR 2059157 A5 19710528 - HOECHST AG
- [AP] EP 0065700 B1 19890301
Designated contracting state (EPC)
AT BE CH DE FR GB LI LU NL SE
DOCDB simple family (publication)
EP 0097131 A1 19831228; EP 0097131 B1 19870429; AT E26846 T1 19870515; CA 1203050 A 19860408; DE 3371207 D1 19870604; ES 523109 A0 19850301; ES 8503359 A1 19850301; FI 75580 B 19880331; FI 75580 C 19880711; FI 832062 A0 19830608; FI 832062 L 19831211; GR 81323 B 19841211; IT 1151627 B 19861224; IT 8221805 A0 19820610; JP H0449565 B2 19920811; JP S5956411 A 19840331; NO 161861 B 19890626; NO 161861 C 19891004; NO 832120 L 19831212; PT 76817 A 19830701; PT 76817 B 19860204; US 4481342 A 19841106
DOCDB simple family (application)
EP 83830112 A 19830603; AT 83830112 T 19830603; CA 429993 A 19830609; DE 3371207 T 19830603; ES 523109 A 19830609; FI 832062 A 19830608; GR 830171515 A 19830531; IT 2180582 A 19820610; JP 10186083 A 19830609; NO 832120 A 19830610; PT 7681783 A 19830603; US 49837083 A 19830526